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  3. PRO MN/J321

PRO-X MN-J321 Crankshaft Bearing Seal Kit Cy MN/J321

fits model: Yfm350x, Warrior. make: Yamaha. year: 1987–2004.

J321 Pro-x Mn/j321 Crankshaft Bearing And Seal Kit For 1987-2004 Yamaha Yfm350x Warrior Cy

( Brand: Pro-x ), ( Manufacturer Part Number: MN/J321 ), ( Compatible Year: 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 ), ( Compatible Model: Yfm350x Warrior ), ( Bundle Description: 1 Pc Genuine Pro-x Crankshaft Bearing And Seal Kits ), ( Type: Crankshaft Bearing And Seal Kits ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review PRO X Mn/j321 Crankshaft Bearing And Seal Kit Yamaha Cy fits WARRIOR YFM350X 1987–2004

Introducing the PRO-X MN/J321 crankshaft bearing seal, specifically designed for Yamaha YFM350X Warrior models produced between 1987 and 2004. This top-quality seal is an essential component for maintaining the engine's performance and reliability.

Crafted from superior materials, the PRO-X MN/J321 crankshaft bearing seal boasts a high-tensile rubber compound that ensures an excellent seal against crankshaft bearing lubricant. It is engineered to withstand the rigors of off-road riding, providing superior sealing performance and preventing oil leaks.

The seal features an O-ring design, which offers multiple benefits. It allows for a precise fit onto the crankshaft, eliminating any potential for play or excess movement. Additionally, the O-ring design ensures that the seal conforms perfectly to the engine's contours, creating a leak-free seal that protects against contamination and engine damage.

Installation of the PRO-X MN/J321 crankshaft bearing seal is a straightforward process. The seal comes complete with detailed instructions to guide you through the installation process. It's essential to ensure that the engine is properly warmed up before removing the old seal to facilitate a smooth installation.

In conclusion, the PRO-X MN/J321 crankshaft bearing seal is an indispensable upgrade for your Yamaha YFM350X Warrior. It offers superior sealing performance, preventing oil leaks and ensuring that your engine operates at its optimal level. With its O-ring design and high-quality materials, this seal guarantees a perfect fit and long-lasting reliability. Trust PRO-X to provide you with the best possible parts for your off-road adventure.

The Pro-X MN/J321 crankshaft bearing seal for the 1987-2004 Yamaha YFM350X Warrior ATV is a crucial component for maintaining the engine's sealing integrity. Let's examine the potential advantages and disadvantages of purchasing this seal kit:

Pros:

1. OEM-equivalent quality: The Pro-X MN/J321 crankshaft seal is designed to provide a perfect fit and function similar to the original equipment manufacturer (OEM) seal.

2. Improved engine performance: A leaking crankshaft seal can cause a loss of engine oil, leading to poor performance or even engine damage. Replacing the seal with a new one can help restore engine performance and reduce the risk of costly repairs.

3. Preventing further damage: Neglecting a leaking crankshaft seal can lead to more extensive engine damage. Addressing the issue with a new seal can help prevent additional damage and save you money in the long run.

Cons:

1. Cost: Replacing the crankshaft seal may come with a significant cost, especially when considering labor charges if you're not doing the work yourself.

2. Time-consuming: Installing a new crankshaft seal can be a lengthy process, as it requires removing the engine casing and other components to access the seal.

3. Potential for additional repairs: In some cases, a leaking crankshaft seal might be a symptom of other engine issues. Replacing the seal may reveal the need for further repairs, which can add to the overall cost.

Conclusion:

The Pro-X MN/J321 crankshaft seal for the Yamaha YFM350X Warrior ATV is an essential component for maintaining the engine's sealing integrity and ensuring optimal performance. Although it may come with a cost and require a time investment, the benefits of addressing a leaking seal include improved engine performance, preventing further damage, and peace of mind. It is recommended to replace the crankshaft seal when it begins to leak to avoid potential engine damage and save yourself from more expensive repairs down the line.

part # mnj321 price

  • $80.00

specifications atvsienna:

  • for models: Yfm350x, Warrior
  • for makes: Yamaha
  • for years: 1987-2004
  • brand: Pro-x
  • manufacturer part number: MN/J321
  • compatible year: 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992
  • compatible model: Yfm350x Warrior
  • bundle description: 1 Pc Genuine Pro-x Crankshaft Bearing And Seal Kits
  • type: Crankshaft Bearing And Seal Kits
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement

offer atvsienna:

  • started: October 12, 2025
  • availability: In Stock
  • options: Ship-to-home
  • sold: 0
  • quantity: 1

seller atvsienna:

  • # reviews: 11885
  • rating: 97.6%

returns atvsienna:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Seller

payments atvsienna:

  • credit card: Visa
  • other
  • wallet: Paypal

general atvsienna:

  • ATV, Side-by-Side UTV Parts Accessories > Engines Engine Parts > Other Engine Parts
  • condition: New

shipping atvsienna:

  • class: Standard
  • type: Fixed
  • transit: 5-6 Days
  • service: Standard
  • cost: $0.00
for models: yfm350x, warrior, for makes: yamaha, for years: 1987-2004, compatible year: 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992, compatible model: yfm350x warrior, bundle description: 1 pc genuine pro-x crankshaft bearing and seal kits, type: crankshaft bearing and seal kits, core charge: free no core charge, fitment type: direct replacement,
category: atv parts > atv, side-by-side utv parts accessories > engines engine parts > engine parts, sku: 9221726868822633,

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